| Abstract |
| This study investigates the photocatalytic decomposition of Methylene Blue (MB) under sunlight (ultraviolet light) by titanium dioxide produced from sludge called (TFS) compared to the widely used titanium dioxide (P-25). For the experiment, three types of specimen were prepared: 1) cement, 2) cement mixed with TiO2 (P-25) and 3) cement mixed with TFS; and two types of cement were tested for the cement materials: Type 1 normal Portland cement and Ultra rapid hardening cement. The removal rate of MB was identical as 99.2% for TFS and P-25 when Type 1 normal Portland cement was used. However, the removal rates differed as 92% for TFS and 98% for P-25 when Ultra rapid hardening cement was applied. This result shows that TFS possess the photocatalytic efficiency similar to that of P-25. When TFS was mixed as a catalyst, the MB removal rate was increased when Type 1 normal Portland cement was used as a binder compared to when Ultra raid hardening cement was applied. The optimal condition for the synthesis of TFS with Type1 normal Portland cement was determined as mixing ratio of 27.079% with the reaction time of 118.186 minutes. Therefore, it can be concluded that TFS could potentially be applied as a photocatalyst in the field as it shows similar photocatalytic activities of P-25 under ambient sunlight (ultraviolet). |
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| Key Words |
| Cement, Photocatalysis, Sludge, TiO2, 시멘트, 광촉매반응, 슬러지, 이산화티타늄 |
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